Editing Auto Union (section)

===Racing results===
{{Main|Auto Union racing car}}
The list of drivers for the initial 1934 season was headed by Stuck; he won the [[German Grand Prix|German]], [[Swiss Grand Prix|Swiss]], and [[Czechoslovakian Grand Prix|Czechoslovakian]] events, along with wins in a number of [[Hillclimbing|hill climb]]s, becoming European Mountain Champion.

In 1935, the engine had been enlarged to {{convert|5|L|cuin|0|abbr=on}} displacement, producing {{convert|370|bhp|kW PS|0|abbr=on}}. [[Achille Varzi]] joined the team and won the [[Tunis Grand Prix]] and the [[Coppa Acerbo]]. Stuck won the Italian Grand Prix, plus his usual collection of hill-climb wins, again taking the European Mountain Championship. The new sensation, Rosemeyer, won the Czech Grand Prix.
[[File:Streamlined Auto Union.jpg|thumb|left|Hans Stuck Sr. in an aerodynamic Type B in Italy]]

Stuck also managed to break speed records, reaching {{convert|199|mph|km/h|0|abbr=on}} on an Italian ''autostrada'' in a closed-cockpit streamliner.<ref name="Eyston">{{cite book|title=Motor Racing and Record Breaking|author=G.E.T. Eyston|author2=Barré Lyndon|year=1935|author-link=George Eyston|author2-link=Barré Lyndon}}</ref> Lessons learned from this streamlining were later applied to the [[Mercedes-Benz T80|T80]] [[land speed record]] car.
[[File:Auto-union-type-d.jpg|thumb|1939 Type C/D V16 hillclimb car]]

For 1936, the engine had grown to a full {{convert|6|L|cuin|0|abbr=on}}, and was now producing {{convert|520|bhp|kW PS|0|abbr=on}}; in the hands of Rosemeyer and his teammates, the Auto Union Type C dominated the racing world. Rosemeyer won the [[Eifelrennen]], German, Swiss, and Italian Grands Prix, as well as the ''Coppa Acerbo''. He was crowned [[European Champion (auto racing)|European Champion]] (Auto Union's only win of the driver's championship), and also took the European Mountain Championship.  Varzi won the Tripoli Grand Prix, while Stuck placed second in the Tripoli and German Grands Prix, and [[Ernst von Delius]] took second in the ''Coppa Acerbo''.

In 1937, the car was basically unchanged and did surprisingly well against the new [[Mercedes-Benz W125]], winning five races to the seven of Mercedes-Benz. Rosemeyer took the Eifel and [[Donington Grand Prix|Donington]] Grands Prix, the Coppa Acerbo, and the [[Vanderbilt Cup]]. [[Rudolf Hasse]] won the [[Belgian Grand Prix]].

In addition to the new {{convert|3|L|cuin|0|abbr=on}} formula, 1938 brought other challenges, principally the death of Rosemeyer early in the year, in an attempt on the land speed record on a German ''autobahn''. [[Tazio Nuvolari]] joined the team, and won the Italian and Donington Grands Prix, in what was otherwise a thin year for the team, other than yet another European Mountain Championship for Stuck.

In 1939, as war clouds gathered over Europe, Nuvolari won the [[1939 Belgrade City Race|Yugoslavia Grand Prix]] in Belgrade, while [[Hermann Paul Müller|Hermann P. Müller]] won the [[1939 French Grand Prix]].

{{Silver Arrows}}